Which of the following statements about R² change is true?

1. R² change is calculated in a Hierarchical Multiple Regression analysis as 1 -R² for each block or step.
2. The magnitude of anR² change value is assessed by summing the squared Pearson's (zero-order) correlations
3. SPSS output provides an R² change value for every step of a Standard Multiple Regression analysis.
4. R² change forstep 1 of a Hierarchical Multiple Regression may be different from R²changeforstep2